Method XbpTreeViewItem():setExpandedImage() Foundation
Specifies a new image representing the expanded state.
ASSIGN METHOD :setExpandedImage( <nResId> | <oImage> ) --> lSuccess
This method returns .T. (true) if the expanded image could be updated, otherwise it returns .F. (false).
The method :setExpandedImage() changes the image representing an XbpTreeViewItem object's expanded state. A XbpTreeViewItem is in expanded state if it defines a sub-level of the tree and the sub-level is currently visible. Using method :setExpandedImage(), an item's expanded image can be updated while the object is visible in the tree view. :setExpandedImage() can only be used after the method :create() has been executed.
This method is the ASSIGN method of the member variable :expandedImage. It is called automatically whenever a value is assigned to :expandedImage. Xbase++ applications need not call this method directly. Instead, the value contained in the :expandedImage instance variable should be manipulated.
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